package tcpdemo;

import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.net.ServerSocket;
import java.net.Socket;

// 服务端
public class TcpServerDemo01 {
    public static void main(String[] args) {
        ServerSocket serverSocket = null;
        Socket socket = null;
        InputStream is = null;
        ByteArrayOutputStream baos = null;
        try {

            // 1.我得有一个地址
            serverSocket = new ServerSocket(9999);
            // 2.等待客户端连接过来   和client的socket是一个，想象为插座和插头，这就是client的插头
            socket = serverSocket.accept();
            // 3.读取客户端的输入流消息   while(true){} 一直监听
            is = socket.getInputStream();
            /*
                byte[] buffer = new byte[1024];
                int len;
                while ((len = is.read(buffer))!=-1){
                    String msg = new String(buffer, 0, len);
                    System.out.println(msg);
                }
            */
            // 使用管道流
            baos = new ByteArrayOutputStream();
            byte[] buffer = new byte[1024];
            int len;
            while ((len = is.read(buffer))!=-1){
                baos.write(buffer,0,len);
            }
            System.out.println(baos.toString());

        } catch (IOException e) {
            e.printStackTrace();
        } finally{

            // 4.关闭资源
            try {
                assert baos != null;
                baos.close(); // 关闭管道流
            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                is.close();  // 关闭输入流
            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                socket.close(); // 关闭监听器
            } catch (IOException e) {
                e.printStackTrace();
            }
            try {
                serverSocket.close(); // 关闭服务器套接字
            } catch (IOException e) {
                e.printStackTrace();
            }

        }

    }
}
